<template>
  <div>
    <el-upload
      :action="uploadImgUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      style="display: none"
      ref="upload"
      accept=".jpg,.jpeg,.png,.gif"
    >
    </el-upload>
    <div class="editor" :style="styles">
      <quill-editor
        ref="quillEditor"
        :key="editorKey"
        v-model:content="content"
        :options="editorOption"
        :style="`min-height: ${minHeight}px;`"
        contentType="html"
        @textChange="onEditorChange"
        @ready="onEditorReady"
      />
    </div>
  </div>
</template>

<script>
import { QuillEditor } from '@vueup/vue-quill'
import '@vueup/vue-quill/dist/vue-quill.snow.css'
import { getToken } from "@/utils/auth"

export default {
  name: "Editor",
  components: {
    QuillEditor
  },
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: "",
    },
    /* 高度 */
    height: {
      type: Number,
      default: null,
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: 192,
    },
    /* 只读 */
    readOnly: {
      type: Boolean,
      default: false,
    },
    /* 上传文件大小限制(MB) */
    fileSize: {
      type: Number,
      default: 5,
    },
    /* 类型（base64格式、url格式） */
    type: {
      type: String,
      default: "url",
    }
  },
  emits: ["update:value"],
  data() {
    return {
      content: "",
      editorKey: 0,
      quillUpdateImg: false, // 根据图片上传状态来确定是否显示loading动画，刚开始是false,不显示
      editorOption: {
        placeholder: "请输入内容",
        theme: "snow", // or 'bubble'
        readOnly: this.readOnly,
        modules: {
          toolbar: {
            container: [
              ["bold", "italic", "underline", "strike"],       // 加粗 斜体 下划线 删除线
              ["blockquote", "code-block"],                    // 引用  代码块
              [{ list: "ordered" }, { list: "bullet" }],       // 有序、无序列表
              [{ indent: "-1" }, { indent: "+1" }],            // 缩进
              [{ size: ["small", false, "large", "huge"] }],   // 字体大小
              [{ header: [1, 2, 3, 4, 5, 6, false] }],         // 标题
              [{ color: [] }, { background: [] }],             // 字体颜色、字体背景颜色
              [{ align: [] }],                                 // 对齐方式
              ["clean"],                                       // 清除文本格式
              ["link", "image", "video"]                       // 链接、图片、视频
            ],
            handlers: {
              image: (value) => {
                if (value) {
                  // 触发input框选择图片文件
                  document.querySelector(".editor input[type=file]").click();
                } else {
                  this.quill.format("image", false);
                }
              },
            }
          }
        }
      },
      uploadImgUrl: import.meta.env.VITE_APP_BASE_API + "/common/upload", // 这里写你要上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken()
      }
    };
  },
  computed: {
    styles() {
      let style = {};
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`;
      }
      if (this.height) {
        style.height = `${this.height}px`;
      }
      return style;
    }
  },
  watch: {
    value: {
      handler(val) {
        if (val !== this.content) {
          this.content = val === null ? "" : val;
          // 强制重新渲染编辑器以确保内容正确显示
          this.editorKey++;
        }
      },
      immediate: true
    },
    content(val) {
      this.$emit("update:value", val);
    }
  },
  mounted() {
    // 为编辑器的图片上传添加自定义事件
    this.$nextTick(() => {
      if (this.$refs.quillEditor && this.$refs.quillEditor.getQuill) {
        const quill = this.$refs.quillEditor.getQuill();
        const toolbar = quill.getModule('toolbar');
        toolbar.addHandler('image', this.imgHandler);
      }
    });
  },
  methods: {
    onEditorReady(quill) {
      // 编辑器准备就绪
      this.quill = quill;
    },
    onEditorChange() {
      // 编辑器内容变化时触发
    },
    // 富文本图片上传前
    handleBeforeUpload(file) {
      // 校验文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      // 校验文件类型
      if (file.type.indexOf("image/") == -1) {
        this.$modal.msgError("文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。");
        return false;
      }
      this.quillUpdateImg = true;
    },
    handleUploadSuccess(res, file) {
      // 获取富文本组件实例
      let quill = this.$refs.quillEditor.getQuill();
      // 如果上传成功
      if (res.code == 200) {
        // 获取光标所在位置
        let length = quill.getSelection().index;
        // 插入图片  res.url为服务器返回的图片地址
        quill.insertEmbed(length, "image", import.meta.env.VITE_APP_BASE_API + res.fileName);
        // 调整光标到最后
        quill.setSelection(length + 1);
      } else {
        this.$modal.msgError("图片插入失败");
      }
      this.quillUpdateImg = false;
    },
    handleUploadError() {
      this.quillUpdateImg = false;
      this.$modal.msgError("图片插入失败");
    },
    imgHandler(state) {
      this.addRange = this.$refs.quillEditor.getQuill().getSelection();
      if (state) {
        let fileInput = this.$refs.upload.$refs.input;
        fileInput.click(); // 加触发input框选择文件
      }
    },
    // 重置编辑器内容
    resetEditor() {
      this.content = "";
      this.editorKey++;
      this.$nextTick(() => {
        if (this.$refs.quillEditor && this.$refs.quillEditor.getQuill) {
          const quill = this.$refs.quillEditor.getQuill();
          quill.setText('');
          quill.setContents([]);
        }
      });
    }
  }
};
</script>

<style>
.editor {
  line-height: normal !important;
}
.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "14px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
  content: "10px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
  content: "18px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
  content: "32px";
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}
</style>
